Year 9
Lesson details
Key learning points
- In this lesson, we will be introduced to alternative (symbolic) representations for images and sound, such as vector graphics and MIDI music. We will also be introduced to what compression is and why it is necessary.
Content guidance
- Contains external content.
Supervision
Adult supervision recommended
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
Images can be represented as sequences of colour samples, encoded in binary. What are these images called? (Tick 2 boxes)
JPEGs
PNGs
Vector images
Q2.
Sounds can be represented as sequences of sound samples, encoded in binary. What are these sounds called?
MIDI files
Waves
Q3.
Images can be represented as collections of geometrical shapes (each with its own attributes). What are these images called?
Animation
JPEGs
PNGs
Raster images
Q4.
Music can be represented as a sequence of musical notes (with information on how to play them). What is an example of this called?
MP3 file
WMA file
Q5.
What is a procedure that reduces the size of a representation called?
Decoding method.
Encryption method.